From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthias Lederhofer <matled@gmx.net>
Subject: Re: Interpreting EDITOR/VISUAL environment variables.
Date: Thu, 2 Aug 2007 12:10:56 +0200
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To: David Kastrup <dak@gnu.org>
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David Kastrup <dak@gnu.org> wrote:
> a) Using system and shell-quoting the filename.  Advantage: one can
> set EDITOR='"/home/dak/My Programs/editor"' and have it work.
> Disadvantage: shell-quoting a file name seems shell- and
> system-dependent.

What about this instead of quoting the argument?

    sh -c '$EDITOR "$1" "$2"' editor +5 /path/to/file

(i.e. for C execvp("/bin/sh", "-c", "$EDITOR \"$1\" \"$2\"", "editor",
    "+5", "/path/to/file"))